Molecular beam-thermal hydrogen desorption from palladium

作者：Lobo R F M^*; Berardo F M V; Ribeiro J H F

来源：Review of Scientific Instruments, 2010, 81(4): 043103.

DOI：10.1063/1.3385686

• desorption
• hydrogen
• mass spectroscopy
• molecular beams
• palladium

Among the most efficient techniques for hydrogen desorption monitoring, thermal desorption mass spectrometry is a very sensitive one, but in certain cases can give rise to uptake misleading results due to residual hydrogen partial pressure background variations. In this work one develops a novel thermal desorption variant based on the effusive molecular beam technique that represents a significant improvement in the accurate determination of hydrogen mass absorbed on a solid sample. The enhancement in the signal-to-noise ratio for trace hydrogen is on the order of 20%, and no previous calibration with a chemical standard is required. The kinetic information obtained from the hydrogen desorption mass spectra (at a constant heating rate of 1 degrees C/min) accounts for the consistency of the technique.

• 出版日期2010-4